Pin holder



FIG. 1 illustrates a front view of the claimed design for a pin holder;

FIG. 2 illustrates a top view thereof;

FIG. 3 illustrates a bottom view thereof;

FIG. 4 illustrates a left-side view thereof;

FIG. 5 illustrates a right-side view thereof;

FIG. 6 illustrates a rear view thereof;

FIG. 7 illustrates a cross-sectional view thereof, taken along line 7-7 in FIG. 1; and,

FIG. 8 illustrates a perspective view thereof. 

CLAIM The ornamental design for a pin holder, as shown and described. 